Remove renderer-to-renderer input event forwarding for OOPIFs

content/renderer/render_frame_proxy.cc

Index: content/renderer/render_frame_proxy.cc
diff --git a/content/renderer/render_frame_proxy.cc b/content/renderer/render_frame_proxy.cc
index d6a89cef094a7691e07988a6f390865fcd5af42a..7ab8d943ef31901c5d23b10c882ab7957630137f 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -484,10 +484,6 @@ void RenderFrameProxy::navigate(const blink::WebURLRequest& request,
   Send(new FrameHostMsg_OpenURL(routing_id_, params));
 }
 
-void RenderFrameProxy::forwardInputEvent(const blink::WebInputEvent* event) {
-  Send(new FrameHostMsg_ForwardInputEvent(routing_id_, event));
-}
-
 void RenderFrameProxy::frameRectsChanged(const blink::WebRect& frame_rect) {
   gfx::Rect rect = frame_rect;
   if (IsUseZoomForDSFEnabled()) {